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 $0263-$026C/611-620:   Active File First Addresses (Device numbers)

Kernal-Reference:

 LDA $0263,X : <A HREF="ROMF31F.HTM">$F324</A>
     $0263,Y : <A HREF="ROMF291.HTM">$F301</A>
 STA $0263,X : <A HREF="ROMF291.HTM">$F304</A> <A HREF="ROMF34A.HTM">$F374</A>

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